Cat 797 Off-highway trucks tech specs

Overview

The Cat 797 (2017–2026) is an ultra-class off-highway dump truck aimed at large mining operations where payload, cycle speed, and mechanical durability are central to production. Its 623.69-ton operating weight and 363-ton payload place it firmly in the highest-capacity end of mine hauling, while the Cat C175-20 engine produces 2,828 kilowatts and 16,500 Nm of torque. Unlike AC-drive alternatives, the 797 uses a 7-speed automatic planetary powershift transmission, giving it a more traditional mechanical drivetrain layout for this size of haul truck.

Expert rating: 4 stars

Performance & Efficiency

The Cat C175-20 produces 2,828 kilowatts and 16,500 Nm of maximum torque, giving the 797 the power needed to move a 363-ton payload through demanding haul cycles. Its 7-speed automatic planetary powershift transmission handles power transfer mechanically, while a maximum forward speed of 67.6 km/h helps maintain productive travel times across longer mine roads. The dump body raises in 25 seconds and lowers in 19 seconds, while the hydraulic system works at a 242 bar relief pressure.

In Comparison

Belaz 75710: Carries a larger 450-ton payload and uses AC electric drive, making it the more extreme option for operations focused on maximum tonnes per trip.
Cat 798: Offers a slightly higher 372-ton payload and AC drive system, while the 797 uses a mechanical 7-speed planetary powershift transmission and delivers higher stated net engine power.
Cat 797: Combines a 363-ton payload, 2,828-kilowatt engine, and 67.6 km/h top speed in a mechanical-drive package for large-scale mine hauling.

Final Verdict

Rated 4 stars, the Cat 797 is a serious ultra-class mining truck in the AED 20,000,000–25,000,000 range. Its 363-ton payload, 2,828-kilowatt engine, high travel speed, and 7-speed planetary powershift transmission make it a strong production machine for mines built around mechanical-drive haul trucks, although its scale brings substantial infrastructure and maintenance requirements.